摘要
为探索熔盐在周向非均匀热边界条件下横纹管内的传热特性,采用CFD方法对熔盐在不同结构参数的横纹管内的传热特性进行数值模拟。在非均匀热边界条件下,针对横纹管不同影响因子,设计了25组交叉模拟。通过数值模拟得到了各工况下的Nu数和阻力系数,并引入综合传热系数与场协同理论进行进一步分析,得出最佳横纹结构。结果表明,Re、e/d、P’/e、P’/P对横纹传热有着重要影响,各结构最佳结构下,Nu分别提高了186、183、181、185。场协同理论对熔盐横纹管强化传热效果评价具有重要指导作用,利用场协同理论能够进一步对结构进行优化,最佳强化的横纹管型,综合传热效果提升145%。
In order to explore the heat transfer characteristics of molten salt in the transverse under the condition of circumferential non-uniform thermal boundary,we use the CFD method to numerically simulate the heat transfer characteristics of molten salt in the transverse ducts of different structural parameters.Under non-uniform thermal boundary conditions,we design 25 sets of crossover simulations for different influencing factors of the transverse duct.Through numerical simulation,we obtain the Nu number and resistance coefficient under each working condition,and introduce the comprehensive heat transfer coefficient and field synergy theory for further analysis,ultimately determining the optimal corrugated structure.The results show that Re,e/d,P′/e,and P′/P have significant impacts on the heat transfer in the transverse duct,with Nu values increasing by 1.86,1.83,1.81 and 1.85,respectively,under the optimal structures for each parameter.Field synergy theory has an important guiding role in the evaluation of the enhanced heat transfer effect of molten salt transverse duct.By utilizing this theory,the structure can be further optimized,with the comprehensive heat transfer effect of the best strengthened transverse duct type improved by 14.5%.
作者
方立军
焦少辉
王嘉营
FANG Lijun;JIAO Shaohui;WANG Jiaying(School of Energy Power and Mechanical Engineering,North China Electric Power University,Baoding 071003,China;Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology(North China Electric Power University),Baoding 071003,China)
出处
《华北电力大学学报(自然科学版)》
北大核心
2025年第3期125-133,共9页
Journal of North China Electric Power University:Natural Science Edition
基金
河北省自然科学基金资助项目(E2019502072).
关键词
二元熔盐
横纹管
场协同理论
非均匀热流
binary molten salts
horizontal duct
field synergy theory
non-uniform heat flow
